Question

Someone help me pls, i dont understand it

Answer 1

see below

Explanation:

9x+20 =20

Subtract 20 from each side

9x+20-20 = 20-20

9x = 0

Divide each side by 9

9x/9 = 0/9

x = 0

Answer 2

9x = 0, x = 0

Explanation:

9x + 20 = 20

9x + 20 - 20 = 20 -20 .......subtract 20 from both sides

9x = 0

9x + 20 = 20

(9x+20)/9 = 20/9 .......divide 9 from both sides

x + 20/9 = 20/9

x = 0